Gerald Durrell was born on January 7, 1925 in Jamshedpur, India as Gerald Malcolm Durrell. He was a writer, known for My Family and Other Animals (2005), Tarka the Otter (1979) and The Talking Parcel (1978). He was married to Lee Durrell and Jacqueline Sonia Rasen.
A T-tubule is a deep invagination of the sarcolemma, which is the plasma membrane, only found in skeletal and cardiac muscle cells. These invaginations allow depolarization of the membrane to quickly penetrate to the interior of the cell. ... a role in remodelling of sarcolemma, sarcoplasmic reticulum, and myofibrils.
They secrete renin in response to three things: 1) beta-adrenergic stimulation, 2) decreased renal perfusion pressure (which is detected by the granular cells themselves) and 3) signals from the macula densa. Macula densa cells are specialized cells within the wall of the distal tubule. They sense the salt content and the volume of fluid within the tubule (which is related to the glomerular filtration rate).